javascript - increase descrease font size with line height using jquery -

-

i want jquery code increase or descrease font. tried codes not running well.

here link of demo (am first time using fiddle please can set needed)

i have different sizes font here, @ time of increasing font size makes font of same size.so how fix that?

my code:

<div id='contents'><div><strong>lorem ipsum</strong> dummy text of printing ,  typesetting industry. lorem ipsum has been industry's standard dummy  <div><font face="comic sans ms" size="5" color="#c2c2c2">text ever since 1500s, when unknown printer took galley of  type , scrambled make type specimen book. has survived not  </font></div><font face="comic sans ms" size="5" color="#c2c2c2"> 5 centuries, leap electronic typesetting,  remaining unchanged. popularised in 1960s  release of letraset sheets containing lorem ipsum </font>passages, , more  desktop publishing software <font size="1">aldus pagemaker  including versions of  </font><div><font size="1">lorem ipsum. </font></div></div></div> <a href="#" onclick="increasefont()">increasefont</a> <a href="#" onclick="decreasefont()">decreasefont</a>     <script type="text/javascript"> var $ = jquery var section = '#contents *'; var originalfontsize = $(section).css('font-size'); var originallineheight = $(section).css('line-height');  function resetfont() {     $(section).css('font-size', originalfontsize);     $(section).css('font-size', originallineheight); }  function increasefont() {     var currentfontsize = $(section).css('font-size');     var currentlineheight = $(section).css('line-height');     var currentfontsizenum = parsefloat(currentfontsize, 10);     var newfontsize = currentfontsizenum * 1.2;     $(section).css('font-size', newfontsize);     var currentlineheightnum = parsefloat(currentlineheight, 10);     var newlineheight = currentlineheightnum * 0.1;     $(section).css('line-height', newlineheight);     return false; }  function decreasefont() {     var currentfontsize = $(section).css('font-size');     var currentlineheight = $(section).css('line-height');     var currentfontsizenum = parsefloat(currentfontsize, 10);     var newfontsize = currentfontsizenum * 0.8;     $(section).css('font-size', newfontsize);     var currentlineheightnum = parsefloat(currentlineheight, 10);     var newlineheight = currentlineheightnum * 0.8;     $(section).css('line-height', newlineheight);     return false; } </script>

the primary issue you're calling $(section).css(), returning single value (16px), applying sections. getting code work isn't difficult - you'll want call $(section), use .each() loop through each section , update value way.

i've updated fiddle, has increasefont function updated illustrate workaround. you!

http://jsfiddle.net/p4nbg/2/

and change made:

function increasefont() {     $(section).each(function(idx, el){         var currentfontsize = $(this).css('font-size'),             currentlineheight = $(this).css('line-height'),             currentfontsizenum = parsefloat(currentfontsize, 10),             newfontsize = currentfontsizenum * 1.2;          $(this).css('font-size', newfontsize);          var currentlineheightnum = parsefloat(currentlineheight, 10),             newlineheight = currentlineheightnum * 0.1;          $(this).css('line-height', newlineheight);             }); }

happy javascripting!


Comments

Post a Comment

Popular posts from this blog

python - Subclassed QStyledItemDelegate ignores Stylesheet -

-
i'm trying subclass qstyleditemdelegate remove focus rectangle in qcombobox . even though i'm calling base implementation of paint function , nothing else, result different. looks if parts of style-sheet influence bounding box of item taken consideration. class pstyleditemdelegate(qstyleditemdelegate): def __init__(self, *args, **kwds): super(pstyleditemdelegate, self).__init__(*args, **kwds) def paint(self, *args, **kwargs): qstyleditemdelegate.paint(*args, **kwargs) what have paint unmodified qstyleditemdelegate ? as suggested tried replacing pyside pyqt4 , works, appears bug. update pyside 1.1.2 1.2.1 result same. unfortunately switch breaks other parts of code, if there no other suggestions i'm going accept answer. edit bug tracked here
Read more

java - HttpClient 3.1 Connection pooling vs HttpClient 4.3.2 -

-
i have used httpclient3.1(java) connection pooling below : import org.apache.commons.httpclient.httpclient; import org.apache.commons.httpclient.multithreadedhttpconnectionmanager; import org.apache.commons.httpclient.params.httpclientparams; import org.apache.commons.httpclient.params.httpmethodparams; import org.apache.log4j.logger; public class httpclientmanager { private static logger logger = logger.getlogger(httpclientmanager.class); private static multithreadedhttpconnectionmanager connectionmanager = new multithreadedhttpconnectionmanager(); private static httpclientparams clientparams = new httpclientparams(); static { try { clientparams.makelenient(); clientparams.setauthenticationpreemptive(false); clientparams.setparameter(httpmethodparams.so_timeout, new integer(30000)); // set so_timeout clientparams.setparameter(httpmethodparams.head_body_check_timeout, new integer(3000)); // head responses ...
Read more

node.js - StackOverflow API not returning JSON -

-
i using node.js script gather data stackoverflow. know responses gzipped, put code in should take care of that. script follows: var request = require('request'); var zlib = require('zlib'); function getstackoverflowresponse(url, callback){ request(url, {encoding: null}, function(err, response, body){ if(response.headers['content-encoding'] == 'gzip'){ zlib.gunzip(body, function(err, dezipped) { callback(dezipped); }); } else { callback(body); } }); } var url = "https://api.stackexchange.com/docs/questions#pagesize=2&order=desc&min=2014-01-04&max=2014-02-02&sort=activity&tagged=apigee&filter=default&site=stackoverflow&run=true"; getstackoverflowresponse(url, function(questions) { console.log(questions); }); instead of getting json output, i'm getting following response: buffer 0d 0a 0d 0a 0d 0a 0d 0a 3c 21 44 4f 43 54 59 50 45 20 48...
Read more